Automatic temperature-regulator



(No Model.)

J. W. BROOK.

AUTUMATIG TEMEEEATUEE EEGULATOE. No. 387,208.

Patented Aug. 7, 1888.

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ihtifrnn dTATns PaTnNT @Trice JAMES W. BROOK, OF LYNCI-IBURG, VIRGINIA.

AUTOMATIC TEMPERATURHHREGULATOR.

SPECIFICATION forming part of Letters Patent No. 387,208, dated August7, 1888..

Application filed November 26,1886. Serial No. 220,000.

To all whom it 'may concern:

Be it known that I, JAMES W. BROOK, of Lynchburg, in the county ofCampbell and State of Virginia, have invented a new and usefulImprovement in Automatic Devices for Shntting Water-Cocks, Windows, die.,of which the following is a specification.

My invention is an improved device for automatically stopping the flowof water, to open or close awindow or other device governing aventilating-opening,or for operating any other device desired under theinfiuence of variations of temperature; and the invention consisis incertain features of construction and novel combinations of parts, aswill be described.

In the drawings, Figure 1 is a side elevation of my improvement, parisbeing shown in section 5 and Fig. 2 is a detail plan view illustrativeof the detcnt mechanism. Fig. 3 shows, in a somewhat diagrammatic View,adifferent arrangement of the shaft from that illustrated in the otherfigures; and.Fig. 4 shows the apn paratns as provided with a single-rod.

The shaft D, water-pipes A C, valve B, and valve-operating connectionswith the shaft are covered in a separate application for patent tiled ofeven date herewith, and I do not claim such devices in this application.I would further say that such devices may in the practice of theinvention herein described be varied in the manner described in theother application aforesaid.

To the shaft I secure a friction plate or disk, F, by holding whichplate the shaft will be locked from turning. To this end-that is, theholding ofthe friction-plate-I provide the rods G and II, bearing attheir adjacent ends on opposite sides of the friction-plate. Normallythese rods bear so tightly against the plate as to prevent its turningunder its rotary tendency; but when under a low temperature the rodscontract, their adjacent points are drawn away from the friction-plateand the latter is free to turn, such operation inthe construction showneffecting a closure of the valve and a shutting off ofthe water or thedesired movement ofthe other device it may be desired to operate.

The rods are usually supported as shown, one, G, being Xed in position,andthe other, H, being adjustable by means of a set-screw,

(No model.)

h, so it may bc set toward and from the frictioirplate to cause the saidplate to be properly clamped between the rods. It will be seen that therod G operates as a bearing and might in the broad principles oftheinvention be substituted by a fixed bearing; but it is preferred touse the rod as shown, for the reason that thereby the contraction ofsaid rod under the influence of cold co-operates with that of theadjustable rod H.

In the construction shown it will be seen that the detenterods G H arearranged at such angles to the friction plate that they operate asfrictionpawls, permitting the rotation of the friction-plate in thatdirection in which it is turned in the revolution of the shaft necessaryto set same to secure the valve, window, or other device in its normalposition, but which rods will normally bind against the plate andprevent its rotation in the reverse direction. However, it will be seenthat under the influence of cold the rods G and H, or, when but one rodis used, as shown in Fig. 4, the rod H will contract and draw away fromthe frictionplate, and the latter and its shaft will be permitted torotate under the infiuence of its drivingforce. While it is preferred toprovide means for adjusting one of the rods G H, manifestly they bothmay be fixed at their outer ends. These rods G and H may be of metal,or, if desired, of other suitable material.. To secure them properly inposition, I prefer to provide guides I, in which the rods G and Hmovelongitudinally, and said guides are shown as provided withanti-friction bearings t' for the rods, so the latter may freelycontract and expand under variations in temperature.

In operation it will be seen the valve or other device will be held openin ordinary weather, lout on a considerable fall in temperature will loeclosed by means of its connection with the shaft when the friction-plateis released by the contraction of the rod. Manifestly when the plate isof sufficient rigidity a single rod may be employed without a bearing onthe opposite side of the plate, and the arrangement of a single rod tobear on the edge instead of against the side of the plate would involveno departure from the broad principles of my invention. By means of theset-screw 7a the rod H may be set to release the plate at any desiredtemperature, and it is preferred to provide the set-screw with apointer, y', registering along a graduated scale, J, in order that itmay be determined with accuracy at what degree of heat the frictionplatewill be released.

Manifestly the shaft may be arranged Vertically with the friction-plateor disk horizontal, and the detent-rods arranged one above and the otherbelow the said plate, as shown in Fig. 3.

Having thus described myinvention,what I claim as new isl. In anapparatus substantially as described, the combinatiomwith afriction-plate,of a longitudinally-eontractible rod bearing at one endthereagainst and adapted to be contracted under the influence of cold,whereby said plate may be normally held by the said rod7 but will bereleased on a considerable fall in temperature, substantially as setforth.

2. In an apparatussubstantially as described, the combinatiomwith afriction-plate, of a longitudi nallycontractible detent-rod arranged tobear at one end against said plate, and a screw for adjusting saidrod,substantially as set forth.

3. A friction-plate movablysupported combined with alongitudinally-contractible detent-rod arranged to bear at one endagainst said plate and located atan angle to said plate, substantiallyas described,whereby to operate as a friction-pawl, as and for thepurposes specified.

4. The combinatiomwith a friction-plate, of

vrods arranged on opposite sides thereof and having their inner oradjacent ends set to bear against the friction-plate, substantially asset forth.

5. The combination of the friction-plate, the detent-rods, and theguide-frames I, having anti-friction bearings for said detentrods,substantially as set forth.

6. The combination of the friction-plate, the rod bearing thereagainst,the set-screw, and a pointer, and scale whereby to determine at whatdegree the plate will be released, substantially as set forth.

7.' In an automatic apparatus substantially as described, thecombination, with a frictionplate having a ilat side, of alongitudinallycontractible rod bearing at one end tightly against thedat side of said plate, all substantially as and for the purposesspecitied.

8. In an automatic apparatus substantially as described, the combinationof a shaft, connections between said shaft and the device to beoperated, a friction-plate fixed to said shaft, I

set forth.

JAMES W. BROOK. Vitn esses:

P. B. TURPIN,

SoLoN C. KEMoN.

